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Cinematographers, and officers, on patrol in 'End of Watch' ★★ 1/2

Writer-director David Ayer has described his new film "End of Watch" as akin to "watching YouTube — where something in your mind tells you this is real. This film is like YouTube meets 'Training Day' in a lot of ways." (Ayer wrote "Training Day," which won Denzel Washington an Oscar for his role as a dirty LAPD detective.) So: What does that YouTube comparison mean, exactly?